<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=A, initial-scale=1.0">
    <link rel="stylesheet" href="index.css">
    <title>动画倒计时</title>
</head>
<body>
    <div class="counter">
        <div class="nums">
            <span class="in">3</span>
            <span>2</span>
            <span>1</span>
            <span>0</span>
        </div>

        <h4>Get Ready</h4>
    </div>

    <div class="final">
        <h1>GO</h1>
        <button id="replay">
            <span>Replay</span>
        </button>
    </div>
    <script src="index.js"></script>
</body>
</html>